Kyrgyzstan said today its decision to shut a U.S. air base was final, dealing a blow to Washington's efforts to retain what has been a major staging post for U.S. forces fighting in Afghanistan, according to Reuters. The United States said it was still in talks with Kyrgyzstan about keeping the Manas base in the impoverished former Soviet republic and traditional Russian ally. "The decision has been made," said Kyrgyz government spokesman Aibek Sultangaziyev. "The U.S. embassy and the (Kyrgyz) Foreign Ministry are exchanging opinions on this, but there are no discussions on keeping the base." Kyrgyzstan's stance has set a tough challenge for new U.S. President Barack Obama, who plans to send additional troops to Afghanistan to try and boost NATO efforts to defeat Taliban and al Qaeda insurgents. Kyrgyz President Kurmanbek Bakiyev announced the closure of the base this week after securing more than $2 billion in financial aid and credit from Russia at talks in Moscow. The announcement left the United States scrambling to find alternative supply routes through other parts of Central Asia for shipments bound for landlocked Afghanistan.